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The Bard 8201-078 bypass timer is a 24V adjustable time-delay control used to momentarily bypass a safety input during startup, helping Bard wall-mount HVAC units ride through brief low-pressure or similar switch conditions without nuisance trips. With an adjustable delay range of 10 to 1000 seconds, this OEM Bard timer is commonly applied in low-ambient or winter-start situations where pressures may take longer to stabilize, supporting smoother compressor operation and reducing unnecessary lockouts. Match the part number to your unit documentation to ensure proper wiring and timing function for your specific Bard configuration.